An optimization methodology to increase the noise transmission loss (TL) of damped sandwich structures is presented. The prediction of the TL uses a numerical tool based on a finite element formulation for the sandwich plate coupled to a boundary element method for the acoustic medium. This tool can be used for arbitrarily shaped three-layer sandwich plates with various boundary conditions and it is well adapted to parametric and optimization studies. First, a parametric study was conducted to choose the objective function, the constraints, and the pertinent design variables to use in the optimization problem which consist in reducing the sound power transmitted by a viscoelastically damped sandwich plate. Next, by constraining the acoustical behavior of the sandwich panel, the surface mass of the sandwich structure was minimized. It is shown that a significant reduction in the transmitted sound power can be achieved by selecting the appropriate geometric configuration and damping layer material.
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October 2013
Research-Article
Optimization of Noise Transmission Through Sandwich Structures
Mohamed Guerich,
Mohamed Guerich
1
Département de Mécanique des Systèmes,
Ecole Supérieure d'Ingénieurs Léonard de Vinci (ESILV),
Paris la Défense Cedex,
e-mail: mohamed.guerich@devinci.fr
Ecole Supérieure d'Ingénieurs Léonard de Vinci (ESILV),
Paris la Défense Cedex,
Paris 92916, France
e-mail: mohamed.guerich@devinci.fr
1Corresponding author.
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Samir Assaf
Samir Assaf
Laboratoire d'Acoustique et Vibration,
Ecole Supérieure des Techniques Aéronautiques et de Construction Automobile (ESTACA),
e-mail: samir.assaf@estaca.fr
Ecole Supérieure des Techniques Aéronautiques et de Construction Automobile (ESTACA),
34 rue Victor Hugo, Levallois-Perret 92300, France
e-mail: samir.assaf@estaca.fr
Search for other works by this author on:
Mohamed Guerich
Département de Mécanique des Systèmes,
Ecole Supérieure d'Ingénieurs Léonard de Vinci (ESILV),
Paris la Défense Cedex,
e-mail: mohamed.guerich@devinci.fr
Ecole Supérieure d'Ingénieurs Léonard de Vinci (ESILV),
Paris la Défense Cedex,
Paris 92916, France
e-mail: mohamed.guerich@devinci.fr
Samir Assaf
Laboratoire d'Acoustique et Vibration,
Ecole Supérieure des Techniques Aéronautiques et de Construction Automobile (ESTACA),
e-mail: samir.assaf@estaca.fr
Ecole Supérieure des Techniques Aéronautiques et de Construction Automobile (ESTACA),
34 rue Victor Hugo, Levallois-Perret 92300, France
e-mail: samir.assaf@estaca.fr
1Corresponding author.
Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received September 23, 2011; final manuscript received October 5, 2012; published online June 18, 2013. Assoc. Editor: Thomas J. Royston.
J. Vib. Acoust. Oct 2013, 135(5): 051010 (13 pages)
Published Online: June 18, 2013
Article history
Received:
September 23, 2011
Revision Received:
October 5, 2012
Citation
Guerich, M., and Assaf, S. (June 18, 2013). "Optimization of Noise Transmission Through Sandwich Structures." ASME. J. Vib. Acoust. October 2013; 135(5): 051010. https://doi.org/10.1115/1.4024216
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